Saw.



'PATBNTBD AUG. 22, 1905.v

f No. 797,947.

C. DILKS.

SAW.

APPLICATION FILED UL20. w05.v

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CALVIN DILKS, OF ALLCWAY, NEW JERSEY.

SAW.

specicatin of Letters Patent.

Patented Aug. 22, 1905.

Application filed April 20, 1905. Serial No. 256,607.

To (all wtmn it may concern.'

Be it known that I, CALVIN DILKs, a citizen of the United States,and aresidentofAlloway, in the county of Salem and State of New J ersey, havemade certain new and useful Improvements in Saws, of which the followingis a specification.

My invention is an improvement in saws, capable of application to bandor circular saws, as desired; and itconsists in certain novelconstructions and combinations of parts, as will be hereinafterdescribed and claimed.

In the drawings, Figure l is a side elevation of a portion of a sawprovided with my improvement. Fig. 2 is a cross-section on about line 22 of Fig. 1. Fig. 3 is an edge view of the saw. Fig. A is a detailperspective view of the key. Fig. 5 is a detail perspective view of thebit, and Fig. 6 is a cross-section of the bit on about line 6 6 of Fig.5.

The blade A has the throats B, whose bases B form the gullets and whoserear walls B2 form the seats for the bits C. The bits C are shoulderednear their outer ends to bear at C/ against the blade A, and astop-surface B3 is also provided for the inner ends of the bits C, sothe said bits are braced both at their inner ends and near their outerends, as will be understood from Fig. 1 of the drawings.

The bits C are provided in their front faces with recesses C2,preferably curved, as shown, and forming seats for the keys D and alsoproviding an enlarged inner end C3 on the bit, by which the latter maybe locked to its eat by the key when applied as shown in The tongue Eprojects from the body of the blade A into the throatB in advance of theseat B? for the bit and forms an abutment for the key when the latter isapplied as shown in Fig. l. This tongue E projects outwardly to a pointopposite the recess C2 of the bit C, which is enlarged slightly at E inorder to form an undercut surface for engagement by the enlarged end ofthe key D when the latter is applied as shown in Fig. 1. This keyD maybe of any suitable malleable material, such as malleable steel, is madelarger at its inner end d, gradually tapers toward its opposite end orpoint CZ', and is preferably made yof a width slightly greater than thethickness of the tongue E, as best shown in Fig. 2, so that after thekey has been applied, driven to locked position, and bent as indicatedin dotted lines, Fig. 1, it may be hammered on its opposite sides tocause it to interlock with the chamfered edges c of the tongue E and tobring it to approximately the thickness of the said tongue E, as bestshown at the right in Fig. 2 of the drawings.

In applying the bitsand keys the bit may be fitted to place, as shown inFig. 1, and the key be slipped laterally to the position shown at theleft in Fig. 1 between the bit and the tongue E and may then be drivenby suitable force applied to its butt-end to the position shown at theleft in Fig. 1, in which its tapered form may be caused to bind the bitC firmly against the seat-wall B2 and to lock the said bit in place bythe engagement of the key with the abutment formed by the tongue E. Avblock F or other suitable stop may then be applied to the butt-end ofthe key D and the latter be bent at its point end from the positionshown in full lines at the left in Fig. 1 to the position indicated indotted lines at the same point, whereby the key will be locked securelyin place to hold the bit in position for use. This bending of the pointend of the key down over the front face or edge of the tongue isimportant apart from the locking function referred to, as it forms acover for the front edge of the said tongue and protects the sameagainst wear, the wear of the sawdust entering the throat coming uponthe key, which can be replaced at a small cost, as will be readilyunderstood.

It will be noticed that when the bit is held by the key, applied asbefore described, it will not only be secured in place, but it will bebound so firmly to the saw-blade as to avoid any chattering or loosenesswhich would in any way interfere with the efliciency of the saw, and atthe same time the parts are so applied and held that the keys and bitscan be readily removed whenever desired for any purpose. The tongue E isimportant, as by projecting in advance of the seat-wall for the bit itforms an abutment which is an integral part of the saw-blade and enablesme to secure the bit without any separate fastening devices, except theapplied key, as before described.

The construction is simple, durable, and

will be found to eiiciently serve the purpose Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent,is-

1. The combination substantially as herein described of the saw-bladehaving a throat Whose rear wall forms a seat for a bit, and provided inadvance of said wall with a tongue projecting outwardly into the gulletand spaced apart from said seat-wall and having its wall adjacent tosaid seat undercut, the bit fitted between said seat-wall and tongue andhaving its front edge opposite the tongue recessed and the key madelarger at its butt-end and tapering thence toward its point end andfitted in the space between the bit and the tongue whereby to secure thebit and having its point end bent or returned along the front edge ofthe tongue whereby to lock the bit Ain place and to form aprotecting-cover for the front edge of the tongue as and for the purposeset forth.

2. The improvement in saws comprising the blade having a throat whoserear wall forms a seat for the bit, an abutment projecting into thethroat in advance of said wall, a bit fitting between the wall andabutment and a key operating between the bit and abutment and bent intolocking engagement with the abutment, substantially as set forth.

3. rI he combination of the saw-blade having a seat-wall for a bit, anabutment in advance of said seat-wall, a bit fitting against saidseat-wall and a key operating between the bit and abutment and having4its point end bent along the front wall of the abutment whereby toprotect the same from wear, substantially as set forth. n

4. The combination of the saw-blade having a seat-wall for the bit andan abutment in advance thereof, the bit fitting said seat-wall and thekey initially of greater thickness than the saw-blade and appliedbetween the bit and abutment and swaged laterally into engagementtherewith and bent longitudinally over the outer end of said abutmentsubstantially as set forth.

5. The combination of the saw-blade having a throat whose rear wallforms a seat for the bit, and said blade being provided with an integraltongue projecting into the throat in advance of the said seat-wall, thebit fitting against the seat-wall and having opposite the said tongue arecess for the locking-key, and the locking-key operating between thetongue and bit and bent at its pointend along the front edge of thetongue, substantially as set forth.

6. The combination of the saw-blade having a seat-wall for a bit and anabutment-tongue in advance thereof and having its edges chamfered, thebit fitting against said seat-wall and recessed in its edge opposite theabutmenttongue and the key operating between the bit and abutment-tongueland initially of greater thickness than the said tongue andswagedtially asset forth.

CALVIN DILKS. Witnesses:

VSoLoN C. KEMoN,

PERRY B. TURrIN.

